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[Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packe
From: |
Vincent JARDIN |
Subject: |
[Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packets under high load of traffic |
Date: |
Fri, 11 Mar 2016 22:44:29 -0000 |
Public bug reported:
Description of problem:
- qemu socket becomes full, causing qemu to send incomplete
SET_VRING_CALL messages to vhost-user backend (without proper fd set in
ancillary data).
- after some time, some interrupts are lost, causing the VM to stop
transmitting packets.
How reproducible:
Run a stress tests of a vhost-user interface using an UDP
traffic generator. Traffic generator (IXIA) was connected to 2 physical ports
that are in turn connected to 2 virtio ports through a linux bridge, VM
(running linux) doing routing to forward packets between the 2 virtio ports.
When traffic reaches high pps rates of small packets,
Actual results:
- VM stop transmitting packets
Expected results:
- VM should never stop transmitting packets
Additional info:
We do propose a fix at:
http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg00652.html
** Affects: qemu
Importance: Undecided
Status: New
** Tags: 6wind
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https://bugs.launchpad.net/bugs/1556306
Title:
vhost-user: qemu stops processing packets under high load of traffic
Status in QEMU:
New
Bug description:
Description of problem:
- qemu socket becomes full, causing qemu to send incomplete
SET_VRING_CALL messages to vhost-user backend (without proper fd set in
ancillary data).
- after some time, some interrupts are lost, causing the VM to stop
transmitting packets.
How reproducible:
Run a stress tests of a vhost-user interface using an UDP
traffic generator. Traffic generator (IXIA) was connected to 2 physical ports
that are in turn connected to 2 virtio ports through a linux bridge, VM
(running linux) doing routing to forward packets between the 2 virtio ports.
When traffic reaches high pps rates of small packets,
Actual results:
- VM stop transmitting packets
Expected results:
- VM should never stop transmitting packets
Additional info:
We do propose a fix at:
http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg00652.html
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1556306/+subscriptions
- [Qemu-devel] [Bug 1556306] [NEW] vhost-user: qemu stops processing packets under high load of traffic,
Vincent JARDIN <=
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/11
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/14
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, Vincent JARDIN, 2016/03/14
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, cargonza, 2016/03/16
- [Qemu-devel] [Bug 1556306] Re: vhost-user: qemu stops processing packets under high load of traffic, cargonza, 2016/03/16